System for transferring toner to and from a photosensitive drum

Details System for transferring toner to and from a photosensitive drum System for transferring toner to and from a photosensitive drum

1997-06-03

1999-11-16

Braun, Fred L.

Electrophotography

Internal machine environment

Particle or contaminant control

399105, 399149, G03G 1508, G03G 2100

Patent

active

059872772

ABSTRACT:
A space between side seals at both sides of a supplying roller becomes gradually wide by inclining the leading edges of the side seals for making a width W1 at a position immediately before the side seals are in contact with a developing roller larger than a printable width W2 (the minimum width between the side seals). Further, a width W3 of a cleaning roller is set to be larger than the width W2 and smaller than the width W1. By this construction, residual toner is entirely removed by the cleaning roller at the printing operation, and all of the collected toner is caused to be concentrated within the width W2 by the side seals during the non-printing operation

REFERENCES:
patent: 3809012 (1974-05-01), Delvecchio
patent: 3914045 (1975-10-01), Namiki et al.
patent: 5333041 (1994-07-01), Ito et al.
patent: 5625440 (1997-04-01), Matsumae et al.
patent: 5717973 (1998-02-01), Endoh et al.
patent: 5740494 (1998-04-01), Shoji et al.

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